This book has been edited from the manuscripts of the late Scottish economist, Duncan Black. Shortly after the publication of The Theory of Committees and Elections , Black started to collect material for papers and a book on Lewis Carroll’s theory of proportional representation. Black’s chapter plans made it clear that the book was to be in three parts, written by himself, followed by a reprint of Carroll’s Principles of Parliamentary Representation and its main sources. Part 1 is biographical, introducing Lewis Carroll and giving relevant details of his life. Part 2 is Black’s already published work on Lewis Carroll. Part 3 comprises the more detailed arguments about Carroll’s reasoning, and Part 4 contains reprints of rare original material on proportional representation by Carroll, James Garth Marshall and Walter Baily.